doula odula duola udola oudla uodla dolua odlua dloua ldoua oldua lodua duloa udloa dluoa lduoa uldoa ludoa oulda uolda oluda louda uloda luoda doual odual duoal udoal oudal uodal doaul odaul daoul adoul oadul aodul duaol udaol dauol aduol uadol audol ouadl uoadl oaudl aoudl uaodl auodl dolau odlau dloau ldoau oldau lodau doalu odalu daolu adolu oadlu aodlu dlaou ldaou dalou adlou ladou aldou oladu loadu oaldu aoldu laodu alodu dulao udlao dluao lduao uldao ludao dualo udalo daulo adulo uadlo audlo dlauo ldauo daluo adluo laduo alduo ulado luado ualdo auldo laudo aludo oulad uolad oluad louad uload luoad ouald uoald oauld aould uaold auold olaud loaud oalud aolud laoud aloud ulaod luaod ualod aulod lauod aluod
Note: these 'words' (valid or invalid) are all the permutations of the word doula. These words are obtained by scrambling the letters in doula.